package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class LoginInterceptor implements HandlerInterceptor {

//    private StringRedisTemplate stringRedisTemplate;
//
//    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
//        this.stringRedisTemplate = stringRedisTemplate;
//    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        //1.获取请求头中的token
//        String token = request.getHeader("authorization");
//        if (StrUtil.isBlank(token)) {
//            response.setStatus(401);
//            return false;
//        }
////        HttpSession session = request.getSession();
//
//        //2.获取redis中的用户
//        String key = RedisConstants.LOGIN_USER_KEY + token;
//        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
////        Object user = session.getAttribute("user");
//
//        //3.判断用户是否存在
//        if(userMap.isEmpty()){
//            //4.不存在，拦截
//            response.setStatus(401);
//            return false;
//        }
//        //5.将查询到的Hash数据转为UserDTO对象
//        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
//
//        //6.存在，保存信息到ThreadLocal
//        UserHolder.saveUser(userDTO);
//        //7.刷新token有效期
//        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
//
//        //8.放行
////        return HandlerInterceptor.super.preHandle(request, response, handler);
        if(UserHolder.getUser() == null){
            //没有,需要拦截，设置状态码
            response.setStatus(401);
            return false;
        }
        return true;
    }

//    @Override
//    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        //移除用户
//        UserHolder.removeUser();
////        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
//    }
}
